Physiological impairment of adult sockeye salmon in fresh water after simulated capture-and-release across a range of temperatures

Publication year: 2011
Source: Fisheries Research, In Press, Accepted Manuscript, Available online 3 September 2011</br>
Marika Kirstin, Gale , Scott G., Hinch , Erika J., Eliason , Steven J., Cooke , David A., Patterson</br>
Sockeye salmon abundance in the Fraser River has declined precipitously over the past two decades, reducing fishing opportunities for this ecologically, culturally and economically valuable species. Release of non-target species that are captured incidentally is a growing conservation measure used in managing mixed species fisheries. Fraser River sockeye salmon are released from commercial, First Nations, and recreational fisheries, however little research exists investigating the fitness and fate of released sockeye salmon, and none examine how the effect of ecologically relevant temperature ranges interact with capture stressors. We exposed adult migrating summer-run sockeye in freshwater to simulated capture and release stressors,...</br>
*Highlights:*? We exposed Fraser River sockeye salmon to simulated capture at three temperatures. ? We examine physiological responses to simulated catch and release. ? Capture elevated plasma lactate, chloride, sodium, and lowered potassium. ? Air exposure at warm temperatures caused equilibrium loss at release. ? Avoiding air exposure may reduce mortality due to secondary capture or predation.</br></br>

4th September 2011 19:42

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